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The equation of sphere described on the joint of points A and B having position vectors 2^i+6^j−7^k and −2^i+4^j−3^k, respectively as diameter. Then the radius of sphere is equal to

Answer» The equation of sphere described on the joint of points A and B having position vectors 2^i+6^j7^k and 2^i+4^j3^k, respectively as diameter. Then the radius of sphere is equal to


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